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"They overheard it and they discussed it right after with their parents," Jones said.

Jones said the parents called the school’s prinicpal, who then called police, and officers arrested the boy.

In juvenile court Thursday morning, authorities said the threats involved the teen "bringing his father's rifle on the bus or to school."

The teen is described as being on the lacrosse team and on honor roll.

Three Rivers Schools put alerts online Wednesday night, but did not send out a call, making some parents mad.

A school spokeswoman says they did not call because there was no immediate danger.

"I cannot stress enough that we will use that All Call system if any child is in any type of potential danger," Lisa Whiteley said.

But some family members felt the online alert didn’t go far enough.

"Your kids are it, I mean, I got a grandson that goes here too, see, I've got two grandkids that goes to school here. If something happens you know, you want to know what's going on," Randall Sumner said.

The teen is charged with inducing panic. He’ll be held at least until a hearing next Friday, a judge said.